libcrypt-des-perl software package provides Perl DES encryption module, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libcrypt-des-perl
libcrypt-des-perl is installed in your system.
Make ensure the libcrypt-des-perl package were installed using the commands given below,
$ sudo dpkg-query -l | grep libcrypt-des-perl *
You will get with libcrypt-des-perl package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Perl |
| Package | libcrypt-des-perl |
| Version | 2.07-1 |
| Description | Perl DES encryption module |
| Sub Section | Perl |